The main shaft castings produced by the above process plan have been inspected for dimensions, NDT and mechanical properties according to the standards required by customers, and all the inspection results are qualified, making the casting a one-time success in research and development. The figure shows the typical metallographic photos of the attached test block and the typical metallographic photos of the casting body, and the table shows the mechanical properties of the attached test block of the casting.
| Project | Tensile strength/MPa | Yield strength/MPa | Elongation/% | Hardness/HB | -30 ℃ impact value/J average value | -30 ℃ impact value/J single value |
| Parameter | 378 | 239 | 20.5 | 143 | 14 | 14.2、14、13.8 |
